<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			.flow ul li{
				list-style: none;
				float: left;
				width: 100px;
				height: 40px;
				border: 1px solid black;
				line-height: 40px;
				
			}
			.flow ul{
			/*1*/	/*height: 40px;*/
			/*2*/	/*overflow: hidden;*/
			
			}
			.wid{
				width: 500px;
				height: 300px;
				border: 1px solid blue;
				background-color: beige;
				
			}
			.box{
				width: 100px;
				height: 100px;
				border: 1px solid skyblue;
				background-color: deeppink;
			/*4*/display: block;
			}
			ul:
			/*3*//*.add{
				clear: both;
			}*/
		</style>
	</head>
	<body>
		<div class="wid">
		<div class="flow">
			<ul>
			<li>我是li</li>
			<li>我是li</li>
			<li>我是li</li>
			<li>我是li</li>
			</ul>
			<div class="add"></div>
			<div class="box"></div>
		</div>
		</div>
	</body>
</html>
